Cylinder-machine.



H. GAARA. GYLINDER MACHINE. APPLIOATION rum) NOV. 15, 1901.

962,208. Patented June 21,1910.

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HALVOR GAARA, OF NEW YORK, N. Y.

CYLINDER-MACHINE.

Specification of Letters Patent.

Patented June 21, 1910.

Application filed November 15, 1907. Serial No. 402,251.

To all whom it may concern:

Be it known that I, HALVOR GAARA, a subject of the King of Norway, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Cylinder- Machines, of which the following is a specification.

My invention relates to the manufacture of wood pulp and paper and more especially to cylinder-machines. In order to save the very fine fibers contained in the water passing through the upper portion of the cylinder, while the latter slowly rotates, a series of radially extending ribs is provided at the inner circumference of the cylinder, said ribs being disposed longitudinally of the cylinder and forming conduits for conducting the water outside of the cylinder, where it can be utilized in different ways. In order that the other water collecting in the lower portion of the cylinder is practically free from fibers and dust stuff it is important that the level of the pulp-carrying water in the tank containing the cylinder is kept as high as possible and always uniform. For accomplishing this end, either an automatic valve can be arranged in the conduit, through which the pulp-carrying water is conducted into the tank containing the cylinder, or the tank can be provided with an overflow, whereby a uniform level in the tank is maintained.

For the sake of a better understanding, I have illustrated my invention.

On the accompanying drawing, Figure 1 shows in a diagrammatic way a cylinder machine, the tank having connected therewith a supply pipe, in which an automatic valve is provided. Fi 2 shows a cylinder machine in connection with an overflow.

The tank 1 is divided by a partition wall 2 into two compartments A and B,thelarger one A of which contains the cylinder 8, which is secured to a shaft 4, rotatably journaled in suitable bearings. On its inner circumference, the cylinder 3 is provided with a continuous series of ribs 5, extending radially toward the center of the cylinder and forming conduits 6. While the cylinder slowly rotates in the direction of the arrow,

the fibers contained in the water will be de- I posited on the outside of the cylinder. The fibers are then taken off by the couch-roll 7, held in contact with the cylinder, whereas the water will pass through the cylinder and flow into the conduits 6, by means of which it is conducted outside of the cylinder into a receptacle 8 from where it may be conducted back to the pulp carrying water. Against the couch-roll 7 bears the well-known scraper 9, whereby the excess of pulp is removed and delivered into the compartment B.

As seen in Fig. 1, a supply pipe 10 is connected with the tank, in which pipe is provided an automatic valve 6 of any desired construction. The valve is so arranged that it will always maintain a uniform level in the tank. The construction of such valves being well known, it will not be necessary to describe the same.

In Fig. 2, similar reference numerals designate similar parts, as those shown in Fig. 1. In this form of my invention, however, there is interposed in the supply-pipe 10 a smaller tank 11 provided with an overflow 12. In the cylinder tank and in the tank 11 the same level is always maintained. If the level rises above a certain height, the pulpcarrying water in the smaller tank 11 will escape by way of the overflow 12 and flow into a trough or receptacle 13, from where it may be conducted back to the pulp-vat. In the supply-pipe 10, a shut-off valve 14 is provided in case the pulp-carrying water is to be supplied to the cylinder-tank directly. To this end, a second supply pipe 15 is connected with. the lower end of the cylinder tank, which pipe is provided with a shut-off valve 16. Of course, a plurality of cylinder tanks can be connected with a common overflow tank or a common automatic valve that shown in Fig. 1, whereby the level. in all the cylinder-tanks is maintained uniform.

lVhat I claim and desire to secure by Letters Patent is:

In a cylinder machine the combination with a tank divided into two compartments, and a cylinder rotatably mounted in one of said compartments and provided on its inner periphery with conduits for the water passing through the upper portion of said of said first supply conduit, and a shut-01f cylinder, of a water supply conduit termivalve in each of said supply conduits. 10 nating in said tank and a second tank dis- In testimony whereof I aflix my signature posed in said supply conduit on a level with in presence of two witnesses.

the said first tank, and provided with an HALVOR GAARA. overflow for the purpose specified, and a Witnesses: second water supply conduit connected with L. H. STAADEN,

the cylinder containing tank, independently ALFRED MULLER. 

